US3786654A - Latch seat for knitting needle - Google Patents

Latch seat for knitting needle Download PDF

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Publication number
US3786654A
US3786654A US00272730A US3786654DA US3786654A US 3786654 A US3786654 A US 3786654A US 00272730 A US00272730 A US 00272730A US 3786654D A US3786654D A US 3786654DA US 3786654 A US3786654 A US 3786654A
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Prior art keywords
latch
blade
seat
slot
needle
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US00272730A
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J Sgrillo
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EXELTOR Inc A CORP OF CANADA
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Torrington Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
    • B21G1/00—Making needles used for performing operations
    • B21G1/02—Making needles used for performing operations of needles with eyes, e.g. sewing-needles, sewing-awls
    • B21G1/04—Making needles used for performing operations of needles with eyes, e.g. sewing-needles, sewing-awls of needles specially adapted for use in machines or tools
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/04—Latch needles

Definitions

  • This invention relates to latch needles for knitting machines. More particularly, this invention is a new latch seat.
  • the latch In the normal operation of the latch in a latch knitting needle, the latch is rotated about a pivot from the closed position where it strikes into the hook to the open position where it strikes against the blade. This rotation is extremely fast in modern equipment and the blows are sufficiently hard to cause extreme wear conditions and often actual breakage.
  • the first group is concentrating on making the blade stronger or the blow of the latch lighter. Thicker needles, variations of slots to leave more metal also lighter or shorter latches and special latch materials have been used to lessen the blow of the latch. Special heat treatments have all been used, also.
  • the second group is concentrating their effort on the latch itself.
  • the area of the latch which contacts the blade is specially shaped to increase the area of contact and to change the angle of the forces imparted to the blade.
  • the third group is concentrating their effort on the latch seat.
  • the U.S. Pat. to Wiederhut, et al. No. 3,031,867 issued May 1, 1962 shows an example of a latch seat resulting from the efforts of this third group.
  • the Weiderhut latch seat since it is formed by milling, is difficult to manufacture properly, weakens the blade sides by displacing metal material from the sides and at best provides a thin weak seat.
  • My invention is a result of my efforts to improve the latch seat.
  • my invention is a latch needle for knitting machines having a blade with a slot, and a latch pivotally arranged in the slot.
  • the latch seat is formed by displacing laterally inwardly into the slot at least a portion of one side of the blade.
  • FIG. 1 is a side view of a commonly used latch knitting needle showing what is commonly referred to as the head and blade area;
  • FIG. 2 is a view taken along lines 2-2 of FIG. 1;
  • FIG. 3 is a view similar to FIG. 2 but showing the manner of laterally displacing one side of the blade
  • FIG. 4 is a side view of a portion of the new latch needle after the seat has been formed by the method of FIG. 3;
  • FIG. 5 is a view similar to FIG. 3 showing the displacement of both sides of the blade.
  • the latch needle includes a hook 10 on the end of a blade 12.
  • a latch 14 rotates about the pivot 16 connected across a slot 18 formed in the blade 12. As shown in FIG. 2, the slot 18 divides the blade into blade sides 20 and 22.
  • FIG. 3 A method of forming my new latch seat is illustrated in FIG. 3.
  • the punch 24 supported by punch support 26 has an inclined surface 28.
  • the inclined surface partially shears the blade side 20 and provides a controlled angular displacement inwardly into the slot 18 of a portion of the blade side 20. This provides a seat 30 in the slot 18 which latch 14 contacts in the open position.
  • the punch is positioned to locate the top 32 surface of seat 30 to provide proper contact with the latch, as shown in FIG. 4.
  • the seat contacting portion of the latch 14 is the same shape as the top surface of the seat 30.
  • a second punch 34 supportd by punch support 36 and having an inclined surface 38 is used to laterally displace a portion of the blade side 22, thus, providing a second seat member 40.
  • the free ends of the displaced blade sides extend substantially across the slot 18 and the base of the seats are integral with and co-extensive with the corresponding blade side.
  • a solid seat having astrong inwardly sloping surface oriented to match the latch is provided. Also, the sides of the blade above the seat are not weakened because the seat is not formed by a milling operation and no metal material is removed from the sides of the blade above the seat to provide the seat.
  • a latch needle for knitting machines having a blade with a slot and a latch pivotably arranged in the slot, the improvement comprising:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Abstract

The latch seat is formed by displacing laterally inwardly into the latch slot a portion of one side or a portion of both sides of the blade.

Description

United States Patent 1191 Sgrillo Jan. 22, 1974 LATCH SEAT FOR KNITTING NEEDLE 1,991,140 2/1935 Currier 66/122 3,031,867 5/1962 W' d h t t l. 66/121 [75] Invent: John Torrmgmn Conn- 1,433,123 11/1921 13;; 66/122 [73 A i The Ton-ington Company, 3,453,845 7/1969 Blackwell 66/121 Torrington, Conn.
[22] Filed; Ju|y 18, 1972 Primary Examiner-W. C. Reynolds Assistant ExaminerA. M. Falik 1 1 p NO-I 272,730 Attorney, Agent, or Firm-David W. Tibbott et a1.
52 us. c1. 66/121 [51] 1m. 0...; D04b 35/04 1 ABSTRACT [58] Field of Search 66/121, 122 The latch Seat is formed by displacing laterally wardly into the latch slot a portion of one side or a [56] References Clted portion of both sides of the blade.
UNITED STATES PATENTS 3,022,651 2/1962 Oberem 66/122 2 Claims, 5 Drawing Figures 1 LATCH SEAT. FOR KNITTING NEEDLE This invention relates to latch needles for knitting machines. More particularly, this invention is a new latch seat.
Modern knitting machines operate at great speeds. Improved modern knitting needles with new functional features may now be used at speeds which would have destroyed the knitting needles made only a few years ago.
In the normal operation of the latch in a latch knitting needle, the latch is rotated about a pivot from the closed position where it strikes into the hook to the open position where it strikes against the blade. This rotation is extremely fast in modern equipment and the blows are sufficiently hard to cause extreme wear conditions and often actual breakage.
Those skilled in the art of knitting needle making concentrate their efforts to improve latch knitting needles into three basic groups.
The first group is concentrating on making the blade stronger or the blow of the latch lighter. Thicker needles, variations of slots to leave more metal also lighter or shorter latches and special latch materials have been used to lessen the blow of the latch. Special heat treatments have all been used, also.
The second group is concentrating their effort on the latch itself. The area of the latch which contacts the blade is specially shaped to increase the area of contact and to change the angle of the forces imparted to the blade.
The third group is concentrating their effort on the latch seat. The U.S. Pat. to Wiederhut, et al. No. 3,031,867 issued May 1, 1962 shows an example of a latch seat resulting from the efforts of this third group. However, the Weiderhut latch seat, since it is formed by milling, is difficult to manufacture properly, weakens the blade sides by displacing metal material from the sides and at best provides a thin weak seat.
My invention is a result of my efforts to improve the latch seat. Briefly described, my invention is a latch needle for knitting machines having a blade with a slot, and a latch pivotally arranged in the slot. The latch seat is formed by displacing laterally inwardly into the slot at least a portion of one side of the blade.
The invention as well as its many advantages, may be further understood by reference to the following detailed description and drawing in which:
FIG. 1 is a side view of a commonly used latch knitting needle showing what is commonly referred to as the head and blade area;
FIG. 2 is a view taken along lines 2-2 of FIG. 1;
FIG. 3 is a view similar to FIG. 2 but showing the manner of laterally displacing one side of the blade FIG. 4 is a side view of a portion of the new latch needle after the seat has been formed by the method of FIG. 3;
and FIG. 5 is a view similar to FIG. 3 showing the displacement of both sides of the blade.
Referring particularly to FIG. 1, the latch needle includes a hook 10 on the end of a blade 12. A latch 14 rotates about the pivot 16 connected across a slot 18 formed in the blade 12. As shown in FIG. 2, the slot 18 divides the blade into blade sides 20 and 22.
A method of forming my new latch seat is illustrated in FIG. 3. The punch 24 supported by punch support 26 has an inclined surface 28. The inclined surface partially shears the blade side 20 and provides a controlled angular displacement inwardly into the slot 18 of a portion of the blade side 20. This provides a seat 30 in the slot 18 which latch 14 contacts in the open position. The punch is positioned to locate the top 32 surface of seat 30 to provide proper contact with the latch, as shown in FIG. 4. The seat contacting portion of the latch 14 is the same shape as the top surface of the seat 30.
In FIG. 5 a second punch 34 supportd by punch support 36 and having an inclined surface 38 is used to laterally displace a portion of the blade side 22, thus, providing a second seat member 40.
In both the modification of FIG. 3 and the modification of FIG. 5, the free ends of the displaced blade sides extend substantially across the slot 18 and the base of the seats are integral with and co-extensive with the corresponding blade side.
Among the many advantages of my invention is that a solid seat having astrong inwardly sloping surface oriented to match the latch is provided. Also, the sides of the blade above the seat are not weakened because the seat is not formed by a milling operation and no metal material is removed from the sides of the blade above the seat to provide the seat.
1 claim:
1. In a latch needle for knitting machines having a blade with a slot and a latch pivotably arranged in the slot, the improvement comprising:
a partially sheared portion of at least one side of the blade bent inwardly and perpendicularly to the blade axis to form a free end which forms a latch seat extending substantially across the slot and the base of the seat is co-extensive with said one side of the blade.
2. An improved latch needle in accordance with claim 1 wherein the seat comprises:
a partially sheared portion of the other side of the blade bent inwardly and perpendicularly to the blade axis so that the free end extends into the slot with the base of said sheared portion being coextensive with its corresponding side of the blade, the free ends of the partially sheared portions together forming a latch seat extending substantially across the slot.

Claims (2)

1. In a latch needle for knitting machines having a blade with a slot and a latch pivotably arranged in the slot, the improvement comprising: a partially sheared portion of at least one side of the blade bent inwardly and perpendicularly to the blade axis to form a free end which forms a latch seat extending substantially across the slot and the base of the seat is co-extensive with said one side of the blade.
2. An improved latch needle in accordance with claim 1 wherein the seat comprises: a partially sheared portion of the other side of the blade bent inwardly and perpendicularly to the blade axis so that the free end extends into the slot with the base of said sheared portion being co-extensive with its corresponding side of the blade, the free ends of the partially sheared portions together forming a latch seat extending substantially across the slot.
US00272730A 1972-07-18 1972-07-18 Latch seat for knitting needle Expired - Lifetime US3786654A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4512164A (en) * 1982-10-04 1985-04-23 Fukuhara Needle Company, Ltd. Pivoted latch needle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1433123A (en) * 1921-11-15 1922-10-24 Fred W Corey Knitting-machine latch needle
US1991140A (en) * 1934-02-28 1935-02-12 Acme Knitting Machine & Needle Knitting machine needle
US3022651A (en) * 1958-02-26 1962-02-27 Torrington Co Integral offset bearing for latch of knitting needle
US3031867A (en) * 1958-07-28 1962-05-01 Groz & Soehne Theodor Latch needle for knitting machines or the like
US3453845A (en) * 1966-11-08 1969-07-08 Redditch Hosiery Needles Ltd Latched needles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1433123A (en) * 1921-11-15 1922-10-24 Fred W Corey Knitting-machine latch needle
US1991140A (en) * 1934-02-28 1935-02-12 Acme Knitting Machine & Needle Knitting machine needle
US3022651A (en) * 1958-02-26 1962-02-27 Torrington Co Integral offset bearing for latch of knitting needle
US3031867A (en) * 1958-07-28 1962-05-01 Groz & Soehne Theodor Latch needle for knitting machines or the like
US3453845A (en) * 1966-11-08 1969-07-08 Redditch Hosiery Needles Ltd Latched needles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4512164A (en) * 1982-10-04 1985-04-23 Fukuhara Needle Company, Ltd. Pivoted latch needle

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Owner name: EXELTOR, INC., A CORP OF CANADA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TORRINGTON COMPANY, THE;REEL/FRAME:004174/0088

Effective date: 19821213